Double-walled vessel.



E. FLEISGHHAUBR.

L E S s E V m T.. L A W E T.. B U O D APPLICATION FILED MAY 19, 1908.

Patented May 11, 1909.

'useful Improvements in Double- EMIL FLEISGHHAUER, OF GEHLBERG, GERMANY, "ASSIGNOR TO GEORGE P. lAlu/TIENBERG,

orciNcINN-A'ri, omo. ,v

noUBLE-wiinnnn vnssnr..

To dit whom' vit mayl concern:

-le -itjlinown 'that lf, EMIL IFLnIscnHAUnn,.

a subjectolf the Emperor of Germany, resida u n n l at Gehlherg, 1n Thurmgen, ltlmpne ol r Germany, have invented certain new and NTT 1 sels, of which the following is a specification, ier which I hase obtained Letters Patent ofirermany, No. 331,560, dated February 7, 'i-iil.

Myinvention relates to double walled glass vessels havingv a space between the Walls thereof trom which air-has been withdrawn. it is necessary in `vessels of this nature to sup-` port the inner suspended vvessel from, the

outer vessel, to protect it from'breakage or rupture 4,on account of the air pressure Aand outer' disturbances. For this purpose sult- 'ainy formed bodies of heat-insulating Inaterial are employed which are jammed into the space between the vessels,

)it is the object of my invention to provide a peculiar form for'ithe vessels to enable the supporting bodies to be conveniently introduced and secured in place, the supportingI bodies securing theV innervessel against side wise movement relatively to the outer vessel and preferably also forming supports in a ,i1-a. olI Fi 2 'i and Fie` '2 is a horizontal crosslauf-- a lower portion 2 of smaller diameter,v

longitudinal direction. For this purpose the lower parts of both .vessels are drawn in in stepdire `forno so as to provide preferably' annular offsets upon which the supporting bodies are arranged.

ln the accompanying drawing; Figure 1 is a central vertlcal section of my improved device on a line corresponding to the line section oll my improved device taken on a l.

line corresponding to the line 1/-- 1/ ol Fig. 1`

xiirepresents the inner vessel which coin- 1 prises an upper portion 1 ci larger diameter between' which there is an annular o'll'set 3 which l'orms a ledge or shoulder between the upper and lower portions ol' the inner vessel, the lower portion preferably forming a contraction oll the upper portion. rl"he l outer vessel B has a similar upper portion Ll ol larger diameter and a lower portion 5 ol' smaller diameter, between which there is an annular c'set 6 which forms. a ledge or shoulder, the lower portion preferably forming a contraction ol' the upper portion. The dcgree of contraction is determined by the thickness of the annular space 7 between the Specification of Letters Patent. 4 Application `:filed May 19, 1908. Serial No. @33,692.

Patented May l1, 1909.

walls or vessels, and the relative diameters of the vessels are'preferably such that the upper portion 1 oi the inner vessel may be in bodies of heat-insulating material introduced between the same.

S represents the bodies ol heat-msulatmg l materialwhich preferably comprise a lateral portion Q between said oilsets or ledges, a longitudinal portion 10 extending into that part of the space ol' greater diameter, shown at 11, and a longitudinal.portion 12 extend ing into .that part of the space olsmaller diameter, shown at 13.

14 15 represent the necks oi' the respective inner and outer vessels, the portions 1 4 of larger diameter oi' said Vessels being between said necks and said loffsets or ledges.

iln its preferred construction the inner vessel, the bottom of which has already been formed, is introduced 'through the open bottom of the outer vessel as far as the necks of the same will permit, when the desired number of supporting bodies are placed upon the ledges (i, whereupon the inner vessel is again drawnback for 'exerting the desired pressure u on the supporting bodies which are thus c am )ed between the ledges 3 and vesse s are then welded together at their necks at 16, and t'iey bottom of the outer vessel closed, the space between the vessels having the air Withdrawn from the same through a suitable ni `le which is then fused lor providing a double walled vessel, from the space of which the air has been withdrawn or a vacuum formed therein. It will be observed that by this construction the inner vessel is preserved from detrimental strains which would otherwise result from the introduction of the supporting bodies after fusing of the necks, that the su poi-tin(r bodies are further securely held in p ace, an that the inner vessel thereby receives lateral aiV well as longitudinal support for preventing detrimental movements in either direction, The invention'is suitable for vessels oll any form and size. lHaving thus lully described my invention what l claim as new and desire to Letters Patent is:

.1. In combination, an outer vessel and an inner vessel connected at the top thereof and having a space Atherebetween from which air The secure by,v

icc

los

has been. witl'idrawn, the body of eaeliof said vessels having a lower portion of smaller cliazneter and an upper portion of larger draine- 'ter, and a ledge between said lower portion and upper portion, and heat insulatinfy ina terial between said ledges, substantialy as described.

In eoinbination, a double walled Vessel eoinprising an inner wall and an outer wall having a pace therebetween from which air has been withdrawn and formed with annu lar mating ledges respectively in said inner and outer walls at different elevations, and heat-insulating niaterial between said ledges extending longitudinally beyond said ledges.

3. in combination, an outer vessel and an inner Vessel having a spaee therebetween from which air has b een withdrawn, eaeli or' said vessels having a lower portion ot' smaller diameter, an upper'portion of larger diameter, a neeli ,above said upper portion, and a ledge between said lower portieri and upper portion, and heat-insulating lnateri al between said annular ledges.

e. A glass vessel comprising an inner wall and an outer Wall having space therebetween from which air has been withdrawii, said Walls having contracted lower annu'lar portions and vannular shoulders between said lower contracted portions and the portions thereabove, said shoulders being at diiierent elevations in said respective walls, and supporting bodies at said shoulders for lateral support between said walls.

5. In combination, a glass vessel comprising an inner wall and an outer wall havin g spaee therebetween from which air has been withdrawn, each of said walls having a neck and a contracted lower end forming@` a ledge in each of said walls between said eontraeted lower end and the portion. innnediatolif' there above, said ledges being at dilerent eleva tions in said respective walls, and lieatdnsnlating material at said ledges between said walls, substantially as described.

ln testimony whereof l have subsrribed my naine hereto in. the presence of two subscribing witnesses.

EMIL FLElSCl-HIAUEIL Witnesses z Rnrnn. Gnnrnnn, GUsrAvn l'niUrz, Jr. 

